com.vaadin.flow.data.provider

Interface IdentifierProvider<T>

Type Parameters:

T - the type of the item

All Superinterfaces:

Function<T,Object>, Serializable, SerializableFunction<T,Object>, ValueProvider<T,Object>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface IdentifierProvider<T>
extends ValueProvider<T,Object>

A callback interface that is used to provide the identifier of an item.

Since:

Method Summary

Modifier and Type	Method and Description
static <T> IdentifierProvider<T>	identity() Returns an identifier provider that always returns its input argument.

Methods inherited from interface com.vaadin.flow.function.ValueProvider

apply

Methods inherited from interface java.util.function.Function

andThen, compose

Method Detail

identity

static <T> IdentifierProvider<T> identity()

Returns an identifier provider that always returns its input argument.

Specified by:

identity in interface Function<T,Object>

Specified by:

identity in interface SerializableFunction<T,Object>

Specified by:

identity in interface ValueProvider<T,Object>

Type Parameters:

T - the type of the input and output objects to the function

Returns:

a function that always returns its input argument